X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=liblttng-ust%2Fust-core.c;h=e8dff983279e3ec869ca9bb7b15274852e300919;hb=418446732612a7d47c019cf839f09f7d86621b34;hp=0182d95722040a24d4a57969ff95071eaf51513a;hpb=797b05f6cf195a6699b6aff0a76b8e1274d5b51f;p=lttng-ust.git

diff --git a/liblttng-ust/ust-core.c b/liblttng-ust/ust-core.c
index 0182d957..e8dff983 100644
--- a/liblttng-ust/ust-core.c
+++ b/liblttng-ust/ust-core.c
@@ -18,6 +18,9 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _LGPL_SOURCE
+#include <stdint.h>
+#include <stddef.h>
 #include <stdlib.h>
 #include <lttng/ust-events.h>
 #include <usterr-signal-safe.h>
@@ -25,6 +28,7 @@
 #include "jhash.h"
 
 static CDS_LIST_HEAD(lttng_transport_list);
+static CDS_LIST_HEAD(lttng_counter_transport_list);
 
 struct lttng_transport *lttng_transport_find(const char *name)
 {
@@ -37,6 +41,17 @@ struct lttng_transport *lttng_transport_find(const char *name)
 	return NULL;
 }
 
+struct lttng_counter_transport *lttng_counter_transport_find(const char *name)
+{
+	struct lttng_counter_transport *transport;
+
+	cds_list_for_each_entry(transport, &lttng_counter_transport_list, node) {
+		if (!strcmp(transport->name, name))
+			return transport;
+	}
+	return NULL;
+}
+
 /**
  * lttng_transport_register - LTT transport registration
  * @transport: transport structure
@@ -59,24 +74,45 @@ void lttng_transport_unregister(struct lttng_transport *transport)
 	cds_list_del(&transport->node);
 }
 
+/**
+ * lttng_counter_transport_register - LTTng counter transport registration
+ * @transport: transport structure
+ *
+ * Registers a counter transport which can be used as output to extract
+ * the data out of LTTng. Called with ust_lock held.
+ */
+void lttng_counter_transport_register(struct lttng_counter_transport *transport)
+{
+	cds_list_add_tail(&transport->node, &lttng_counter_transport_list);
+}
+
+/**
+ * lttng_counter_transport_unregister - LTTng counter transport unregistration
+ * @transport: transport structure
+ * Called with ust_lock held.
+ */
+void lttng_counter_transport_unregister(struct lttng_counter_transport *transport)
+{
+	cds_list_del(&transport->node);
+}
+
 /*
  * Needed by comm layer.
  */
-struct lttng_enum *lttng_ust_enum_get(struct lttng_session *session,
-		const char *enum_name)
+struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session,
+		const struct lttng_enum_desc *enum_desc)
 {
 	struct lttng_enum *_enum;
 	struct cds_hlist_head *head;
 	struct cds_hlist_node *node;
-	size_t name_len = strlen(enum_name);
+	size_t name_len = strlen(enum_desc->name);
 	uint32_t hash;
 
-	hash = jhash(enum_name, name_len, 0);
+	hash = jhash(enum_desc->name, name_len, 0);
 	head = &session->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)];
 	cds_hlist_for_each_entry(_enum, node, head, hlist) {
 		assert(_enum->desc);
-		if (!strncmp(_enum->desc->name, enum_name,
-				LTTNG_UST_SYM_NAME_LEN - 1))
+		if (_enum->desc == enum_desc)
 			return _enum;
 	}
 	return NULL;
@@ -106,3 +142,11 @@ void lttng_ust_dummy_get_value(struct lttng_ctx_field *field,
 {
 	value->sel = LTTNG_UST_DYNAMIC_TYPE_NONE;
 }
+
+int lttng_context_is_app(const char *name)
+{
+	if (strncmp(name, "$app.", strlen("$app.")) != 0) {
+		return 0;
+	}
+	return 1;
+}